New Detran-GO rules require prior authorization and issuance of a Vehicle Safety Certificate (CSV) for deep modifications to the vehicle
The Goiás DMV published Ordinance No. 131/2026, which establishes technical criteria for the regularization of vehicles modified with car sound systems. The standard, in force since March 5, aims to fill a technical gap and ensure road safety against fire risks and structural failures, standardizing inspection throughout the state.
Owners of vehicles with deep modifications must now register the change in the Vehicle Registration and Licensing Certificate (CRLV). According to the municipality, the measure facilitates police action and ensures that electrical adaptations do not compromise the integrity of the car or third parties.
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The registration of the change in characteristic is required whenever the installation involves structural changes, such as the removal of seats and seat belts, or the modification of the chassis to house the so-called “walls”. In addition, the inclusion of lithium batteries or systems that significantly change the weight and electrical part requires a project signed by an electrical engineer (ART).
If the total weight of the modified vehicle exceeds 3.5 tons, the driver will need a professional CNH. On the other hand, simple installations remain exempt from registration, as long as the speakers are removable, are restricted to the trunk and do not compromise the original capacity or passive safety of the car.
To regularize the situation, the owner must request prior authorization from Detran-GO, carry out the technical installation and submit the vehicle to an inspection at an institution licensed by Inmetro to obtain the Vehicle Safety Certificate (CSV). The average cost of inspection varies between R$ 500 and R$ 800, while the Detran change fee is R$ 228.35. Failure to comply with the rules is a serious infraction (Art. 230 of the CTB), with a fine of R$ 195.23, five points on the CNH and retention of the vehicle.
